Hand loom heddle shifting device



Oct. 4, 1938. R. LINN HAND LOOM HEDDLE SHIFTING DE VICE 3 Sheets-Sheet 1 Filed March 16, 1938 INVENTOR [away my: /mma ATTORN EYS Oct. 4, 1938. L. R. LINN HAND LOOM HEDDLE SHIFTING DEVICE 5 SheetsSheei 2 Filed March 16, 1938 jeroy ATTORNEYS Oct. 4, 1938. R. LINN HAND LOOM HEDDLE SHIFTING DEVICE Filed March 16, 1938 5 Sheets-Sheet 3 j rqz ZZZZ')? 22 INVENTOR ATTORNEYS Patented Oct. 4, 1938 UNITED STATES PATENT OFFICE 7 2,132,078 HAND LOOM HEDDLE SHIFTING DEVICE I Leroy R. Linn, Sheboygan, Wis.

Application March 16, 1938, Serial No. 196,276

6 Claims.

This invention relates to-' hand loom heddle shifting devices and has for an object to provide a device for facilitating easy and simple shifting of the heddle frames.

A further object is to provide a device of this character having an automatic lock in the upper position of the heddle frame.

A further object is toprovide a device of this character having means for releasing the heddle frames to gravitate to their lower position.

A further object is to provide a device of this character having means for securing the device in an intermediate position for relieving tension on the warp while the loom is not in use.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various I modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification,

Figure 1 is a cross sectional view of a handloom embodying a heddle frame shifting device constructed in accordance with the invention.

Figure 2 is a side elevation of the parts shown in Figure l.

Figure 3 is an enlarged plan view of the heddle frame shifting devices, pawls for holding the heddle frame at their upper limit of movement and trip for releasing the pawls to permit gravitation of the heddle frames.

Figure 4 is a detail side elevation of the parts shown in Figure 3.

Figure'5 is a detail side elevation showing the yoke for holding the heddle frame shifting devices in an intermediate position for relieving tension on the warp when the loom is not in use.

Figure 6 is a fragmentary front elevation of the heddle frame releasing devices for an eight heddle frame loom instead of a four heddle frame loom.

Figure 7 is a fragmentary side elevation of the parts shown in Figure 6.

Figure 8 is a detail side elevation of a modified form of the invention in which a single pawl is employed to automatically look all of the heddle frame shifting devices in position to hold the frames raised.

Figure 9 is a detail perspective view of the pawls shown in Figure 8.

Referring now to the drawings, the heddle frame shifting device comprising the subject matter of this invention is shown to comprise a disc I!) rotatably mounted on a shaft ll carried by the horizontal cross bars l2 of the harness frame, there being one of these discs for each heddle frame, four of such discs being shown in Figures 1, 2 and 3. Each disc is provided with a groove l3 in the periphery extending about an angular distance of 180 degrees and a pair of cables M are secured at one end to a common pin l fixed at one end of the groove. The ends of the cables are secured to the top of a respective heddle frame I5, near the ends thereof, and since the disc is located adjacent to one of the harness frame uprights it one of the cables is comparatively short and is connected direct to one end of the heddle frame while the other cable is comparatively long and is trained over a guide pulley ll secured to the harness frame bars l2.

Each disc is provided with a radially extending handle i8 by means of which the disc may be rotated to wind the cable M on the disc and raise the respective heddle frame or to unwind the cables to lower the heddle frame. The handle engages a stop bar l9 on the harness frame to limit downward movement of the heddle frame.

As best shown in Figures 4 and 5 each disc is provided in the periphery with a shoulder 20 adapted to be engaged by a respective pawl 2| which is pivoted above its longitudinal center upon a shaft 22 whichissecured to the harness bars I2. When each disc is individually swung to wind up the cables and raise the respective heddle frame the respective pawl will be pulled against the shoulder 29 by a spring ll connected with the upper-end of the pawl and will automatically lock the respective heddle frame at its upper limit of movement.

A trip 23 in the nature of an inverted U-shaped bar, best shown in Figure 3, is pivoted at the ends on the shaft H and the cross member of the trip bears lightly upon the spring retracted pawls 2|. When the handle it of any one of the discs is forced against the cross member of the trip, it will be rocked on the shaft H to simultaneously release all of the discs and allow the heddle frames to gravitate to the lowest limit of movement.

In order to relieve tension on the warpwhile the loom is not in use a yoke 24 is pivoted at the ends on the harness frame bars 12 as shown at 25 in Figures 1, 3 and 5. The cross member of this yoke is adapted to be engaged against the shoulders 20 of all of the discs when the discs are rotated to an intermediate position of their travel and lock the discs in this position to hold the 2. heddle frames raised to a point substantially onehalf the limit of their vertical movement.

While a four heddle frame operating device has been described it is obvious that a greater number of heddle frames may be operated by simframe uprights it by straps. 28. which are secured inplace by screws 29. The harness frame horizontal bars H! are then mounted on the edges of these brackets, as best shown in Figures. 6 and. 7. Since the heddle frame operating devices in this embodiment of the invention are identical with the heddle frame operating devices previously described they have been given identical reference characters.

A modified form of the invention is shown in 7 Figures 8 and 9 and this form of the invention is somewhat simpler than the previously described construction. In this modified form of the invention each, disc 3| supports a pair. ofcables 32 for raising and lowering the respective heddle frame. The disc is provided with a handle 33 and at apoint adjacent the handle 'isprovided with a stop shoulder 34. A single pawl 35 best shown in Figure 9, of the gravity operated type is pivoted below its longitudinal center upon a shaf -t. 36 which is secured at the ends to the horizontal harness, frame bars 31. Ifhe pawl engages against the stop shoulder of any disc which may be rotated. to raise its corresponding heddle frame and hold the heddle frame raised.

Each disc is provided in advance of the stop shoulder with acam projection. 38. By rotating any one of the discs until its. cam projection 38 strikes against the pawl, all of the discs previously locked in a position to hold their respective heddle frames raised, will be simultaneously released.

From the above description it is. thought that the construction and operation of the invention will be fully understood without further explanation.

frame, of a plurality of axially aligned discs rotatab-ly secured to said bars each disc havingagrooved peripheryi, a pair of cables secured in the groove of the periphery and connected to a respective heddle frame for raising and lowering the frame when the disc is rotated, means carried by said bars and engaging the discs-to automatically lock the discsstationary tohold the heddle frames raised, and means for releasing said means simultaneously to permit the heddle frames to gravitate. 7

2.v In a loom, the combination with heddle frames and harness bars, of a plurality of axially aligned discs superposed above the heddle frames and rotatably secured to said bars, a pair of cables connected to each disc and to a corresponding heddle frame and adapted to be wound on the periphery of the disc or unwound therefrom to respectively raise or lower said heddle frame, each disc having a stop shoulder formed on the periphery thereof, spring pressed pawls connected to said bars and adapted to engage said shoulder to hold the discs. stationary in the raised position of the frames, and means for reharness bars, axially aligned peripherally grooved I discs rotatably secured to said bars above said heddle frames, cablescarried by each disc windable upon the disc and connected to a respective heddle frame for raising and lowering the heddle frame when the disc is turned, a. gravity operated pawl common" to all of the'discs, shoulders on the discs engageable by said pawl to hold the discs stationary at one limit of movement .to maintain the heddle frames raised,.and means for releasing saidpawl to permit the discs to rotate in a retrograde direction simultaneously and permit the heddle frames to gravitate.

4. The combination with the heddle frames and the harness bars of a loom, of axially aligned discs rotatably mounted on the harness bars above respective heddle frames, cables carried by each disc and windable thereupon when thedisc is rotated, the lower ends of the cablesbeing connected to the upper corners of a respective heddle frame, guide pulleys carried by the bars over which'the cables are trained to maintain the heddle frame level, each disc havinga stop shoulder on the periphery thereof, pawls carried by said bars and engageable with said shoulders to hold the discs stationary at one limit of movement' to hold the heddle frames raised, and an inverted U-shaped trip pivotally connected to said bars and adapted to impinge against said pawls and release the pawls simultaneously from said shoulders to permit the heddle frames to gravitate. i

5. The combination w'th-the heddleframes andharness bars of a loom, of axially aligned rotatably mounted discs carried by the bars above respective ones of the frames, cables windable upon the discs and connected to respective heddle' frames for raising and lowering the'frames, shoulders on the discs, pawls connected to said bars and engageable with the shoulders for holding the discs stationary tomaintain the heddle frames raised to their upper limit of movement,

trip means carried by, the bars engageable with the pawls for releasing the pawls to permitthe frames to gravitate, and means carried by the bars engageablewith said shoulders When the discs are in a substantially midway position of their movement for holding the heddle frames raised to substantially one-half their, limit of vertical movement to relievetension on the warp.

when the loom is not in use.

6. The combination with the heddle. frames and harness bars of a loom, of axially aligned discs rotatably secured to said bars above respective ones of the heddle frames, cables windable upon the discs and connected to said heddle frames for raising an'dlowering the heddle frames when the discs are rotated, shoulders on the discs, pawl means engageablewith said shoulders for holding the discs stationary at one limit of movement to maintain'the'heddle frames raised, and

cam projections on the discs in advance of said shoulders, rotation of anyone of the discs until its cam projection strikes against said pawl means releasing said means'to-permit the heddle frames to gravitate.

LEROYR. LINN. 

